Orbit Fit and Astrometric record for 17BG241

The following information shows the result of the orbit fit based on Gary Bernstein's method. Most of the information should be self-explanatory. Take special note that while the original Bernstein software works with barycentric coordinates, we convert these results into a heliocentric coordinate system.

# Object: 17BG241   
# Created Tue Apr  1 01:11:02 2025
# Orbit generated from Bernstein formalism
# Fitting     26 observations of     26
# Arc:   0.90y
# First observation: 2016/04/02
#  Last observation: 2017/02/23
Preliminary a, adot, b, bdot, g, gdot:
  -0.000016   0.018908   0.000000   0.000453   0.021301   0.000000
# Chi-squared of fit:    22.96 DOF:     46 RMS:  0.17
# Min/Max residuals:    -0.53    0.46
# Exact a, adot, b, bdot, g, gdot:
  1.417859E-05  1.890768E-02  6.537256E-07  4.569555E-04  2.157907E-02  1.188869E-04
# Covariance matrix:
  1.4819E-13  1.6350E-12  3.4512E-15  1.7914E-14  7.7589E-13  7.5780E-11
  1.6350E-12  2.6366E-10  3.5192E-13  2.3395E-12  9.1984E-11  1.0491E-08
  3.4512E-15  3.5192E-13  9.7529E-14 -1.2636E-13  1.2740E-13  1.4177E-11
  1.7914E-14  2.3395E-12 -1.2636E-13  4.4190E-13  8.2654E-13  9.3549E-11
  7.7589E-13  9.1984E-11  1.2740E-13  8.2654E-13  3.2787E-11  3.6880E-09
  7.5780E-11  1.0491E-08  1.4177E-11  9.3549E-11  3.6880E-09  4.1887E-07
#      lat0       lon0       xBary       yBary       zBary        JD0
    2.351644 -175.026261   -0.135185    0.040614   -0.985557  2457480.890769
# Heliocentric elements and errors
Epoch:              2457480.5000  =  2016/04/02
Mean Anomaly:          172.23570 +/-    24.251
Argument of Peri:      245.90556 +/-    24.288
Long of Asc Node:      125.97412 +/-     0.041
Inclination:             2.68100 +/-     0.001
Eccentricity:         0.07418468 +/-    0.0030
Semi-Major Axis:     44.08637762 +/-    0.0412
Time of Perihelion: 2513245.9958 +/-    7202.3
Perihelion:          40.81584374 +/-    0.1389
Aphelion:            47.35691150 +/-    0.1407
Period (y)              292.7284 +/-      0.41
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -47.10250342 +/-    0.0122
Ecliptic Y           -4.23725388 +/-    0.0011
Ecliptic Z            1.90154468 +/-    0.0005
Ecliptic XDOT         0.00019545 +/-    0.0001
Ecliptic YDOT        -0.00239797 +/-    0.0000
Ecliptic ZDOT         0.00005855 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   47.33092035 +/-    0.0122
Geocenter to KBO     46.34120884 +/-    0.0123
# Hcoef:  8.57

The following table shows the complete astrometric record for 17BG241. The first three columns show the date of observation. The next six columns are RA and DEC. The next column (when provided) is the observed magnitude and filter. The next column is the object name (17BG241) followed by the observatory code and reference code for the source of the astrometry.

2016 04  02.38998  12 21 59.37   +00 10 57.7   25.1i 17BG241   T09  C~8HK0      
2016 04  02.41732  12 21 59.26   +00 10 58.5   24.9i 17BG241   T09  C~8HK0      
2016 04  02.44189  12 21 59.17   +00 10 59.2   24.8i 17BG241   T09  C~8HK0      
2016 04  02.46904  12 21 59.05   +00 10 59.8   24.8i 17BG241   T09  C~8HK0      
2016 04  02.50172  12 21 58.92   +00 11 00.7   24.7i 17BG241   T09  C~8HK0      
2016 04  02.52599  12 21 58.83   +00 11 01.4   24.7i 17BG241   T09  C~8HK0      
2016 04  04.36800  12 21 51.48   +00 11 48.2   26.5g 17BG241   T09  C~8HK0      
2016 04  04.38940  12 21 51.39   +00 11 48.9   26.6g 17BG241   T09  C~8HK0      
2016 04  04.41295  12 21 51.29   +00 11 49.9   26.6g 17BG241   T09  C~8HK0      
2016 04  04.41508  12 21 51.30   +00 11 49.6   26.5g 17BG241   T09  C~8HK0      
2016 04  04.41948  12 21 51.28   +00 11 49.9   26.4g 17BG241   T09  C~8HK0      
2016 06  04.25539  12 18 59.94   +00 28 34.3   25.1z 17BG241   T09  C~8HK0      
2016 06  04.28926  12 18 59.85   +00 28 34.3   24.6z 17BG241   T09  C~8HK0      
2016 06  04.30544  12 18 59.82   +00 28 34.1   24.9z 17BG241   T09  C~8HK0      
2016 06  04.32707  12 18 59.83   +00 28 34.4   24.6z 17BG241   T09  C~8HK0      
2016 06  05.31150  12 18 58.85   +00 28 38.1   26.0r 17BG241   T09  C~8HK0      
2016 06  05.31720  12 18 58.83   +00 28 38.3   25.1r 17BG241   T09  C~8HK0      
2016 06  05.35612  12 18 58.80   +00 28 38.5   25.4r 17BG241   T09  C~8HK0      
2017 01  28.59538  12 29 32.88   -00 38 01.5   24.1z 17BG241   T09  C~86um      
2017 01  28.60345  12 29 32.85   -00 38 01.5   25.0z 17BG241   T09  C~86um      
2017 01  28.61148  12 29 32.83   -00 38 01.1   24.7z 17BG241   T09  C~86um      
2017 01  28.61691  12 29 32.82   -00 38 01.1   25.0z 17BG241   T09  C~86um      
2017 01  28.62228  12 29 32.82   -00 38 01.0   24.2z 17BG241   T09  C~86um      
2017 02  23.53583  12 28 26.69   -00 29 44.7   25.6r 17BG241   T09  C~86um      
2017 02  23.56346  12 28 26.62   -00 29 44.2   25.7r 17BG241   T09  C~86um      
2017 02  23.60592  12 28 26.47   -00 29 43.2   25.5r 17BG241   T09  C~86um      

The following table shows the residuals to the orbit fit. The first coumn is the point number. The second column is the time, in years, measured from the first observation. The third and fifth columns are the regularized positions used in the orbit fit. The fourth and sixth columns are the residuals, in arc seconds, for RA and Dec respectively.

     1   0.0000      0.00    -0.07       0.00    -0.07
     2   0.0001     -1.83    -0.08       0.08     0.03
     3   0.0001     -3.35     0.03       0.19     0.15
     4   0.0002     -5.24    -0.06       0.03     0.00
     5   0.0003     -7.39    -0.04       0.08     0.08
     6   0.0004     -8.90     0.05       0.19     0.20
     7   0.0054   -128.67     0.11      -0.53    -0.26
     8   0.0055   -130.19     0.00      -0.43    -0.13
     9   0.0055   -131.96    -0.22      -0.10     0.21
    10   0.0055   -131.71     0.18      -0.32    -0.01
    11   0.0056   -132.10     0.08      -0.16     0.15
    12   0.1721  -2889.96     0.46     -96.37     0.22
    13   0.1722  -2891.20    -0.21     -96.91    -0.22
    14   0.1723  -2891.53    -0.27     -97.27    -0.53
    15   0.1723  -2891.51     0.11     -96.93    -0.13
    16   0.1750  -2906.48     0.12     -99.36    -0.04
    17   0.1750  -2906.83    -0.14     -99.30     0.04
    18   0.1751  -2907.33    -0.03     -99.29     0.16
    19   0.8247   7413.55     0.23      -3.04     0.14
    20   0.8247   7413.14     0.06      -3.22    -0.06
    21   0.8247   7412.70    -0.13      -2.97     0.17
    22   0.8247   7412.56    -0.11      -3.03     0.10
    23   0.8247   7412.52     0.02      -2.93     0.18
    24   0.8957   6303.94    -0.23      59.81    -0.12
    25   0.8958   6302.77     0.14      59.85    -0.12
    26   0.8959   6300.31     0.03      59.88    -0.15

The following table comes from a 10My integration of the orbit of the object. Three columns are shown. The first column is the result of integrating the nominal orbit. The other two columns are based on clones of the nominal orbit that are +/- 3 sigma from the nominal orbit. If all three types agree then the classificiation is deemed secure. The basis for these calculations is described in more detail in AJ, 129, 1117 (2005). Any use made of these calculations should refer to and credit this publication and the Deep Ecliptic Survey Team.

17BG241    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        43.668    44.191    43.616
ecceobj         0.085     0.123     0.088
incobj          2.685     2.687     2.685
qmin           39.002    37.596    38.633
qmax           49.024    51.524    49.367
amean          43.866    44.376    43.833
amin           43.516    43.999    43.473
amax           44.249    44.787    44.229
emean           0.090     0.133     0.094
emin            0.069     0.113     0.070
emax            0.108     0.151     0.116
imean           2.143     2.267     2.119
imin            1.067     1.086     1.054
imax            2.963     3.183     2.997
excite_mean     0.098     0.139     0.102
fracstop        1.000     1.000     1.000
cjmean          3.088     3.082     3.087

libcent 0      -180.0    -180.0    -180.0
libamp  0      -180.0    -180.0    -180.0
libcent 1      -180.0    -180.0    -180.0
libamp  1      -180.0    -180.0    -180.0
libcent 2      -180.0    -180.0    -180.0
libamp  2      -180.0    -180.0    -180.0
libcent 3      -180.0    -180.0    -180.0
libamp  3      -180.0    -180.0    -180.0
libcent 4      -180.0    -180.0    -180.0
libamp  4      -180.0    -180.0    -180.0

kozaimean       181.4     180.6     187.6
kozaiamp        180.0     179.9     179.9